American English

Definition of lifeline noun from the Oxford Advanced American Dictionary

     

    lifeline

     noun
    noun
    NAmE//ˈlaɪflaɪn//
     
     
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  1. 1a line or rope thrown to rescue someone who is in difficulty in the water
  2. 2a line attached to someone who goes deep under the ocean
  3. 3something that is very important for someone and that they depend on The support group is a lifeline for many single mothers.
See the Oxford Advanced Learner's Dictionary entry: lifeline